Microdroplet absorption by two-layer porous media |
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| Authors: | Yu D Varlamov Yu P Meshcheryakov M R Predtechensky S N Ul’yankin |
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| Institution: | (1) Kutateladze Institute of Thermal Physics, Russian Academy of Sciences, Siberian Division, Novosibirsk, 630090;(2) Engineering and Design Branch of the Lavrent’ev Institute of Hydrodynamics, Russian Academy of Sciences, Siberian Division, Novosibirsk, 630090 |
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| Abstract: | Microdroplet absorption by two-layer porous media is studied both theoretically and experimentally. A two-dimensional model
for liquid flow from a droplet into a porous medium is presented and veri.ed based on a simultaneous numerical solution of
the Euler equations taking into account surface tension forces and the unsteady filtration equation. The effect of the structural
parameters of the two-layer porous medium (pore size in the layers, and the thickness and porosity of the layers) on the droplet
absorption is analyzed. It is shown that the presence of the second layer can have a significant effect on the droplet absorption
rate and the liquid distribution in the medium. The pore size is found to be the main parameter that governs the effect of
the second layer.
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 48, No. 1, pp. 121–130, January–February, 2007. |
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| Keywords: | microdroplets porous media absorption |
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